diff --git a/fe/src/main/cup/sql-parser.y b/fe/src/main/cup/sql-parser.y
index 75e41e9..189333f 100644
--- a/fe/src/main/cup/sql-parser.y
+++ b/fe/src/main/cup/sql-parser.y
@@ -802,8 +802,12 @@ select_list_item ::=
 alias_clause ::=
   KW_AS IDENT:ident
   {: RESULT = ident; :}
+  | KW_AS STRING_LITERAL:l
+  {: RESULT = l; :}
   | IDENT:ident
   {: RESULT = ident; :}
+  | STRING_LITERAL:l
+  {: RESULT = l; :}
   ;
 
 star_expr ::=